Post Offices in Mansfield, Ohio, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Mansfield Post Office No Reviews Favorite Fax: (419) 755-4610Phone: (419) 755-4621Retail Hours Sherman Post Office No Reviews Favorite Phone: (419) 529-3672Retail Hours Southwest Post Office No Reviews Favorite Phone: (419) 756-7222Retail Hours